MyStatistics.java

import ec.EvolutionState;
import ec.Statistics;
import ec.util.Parameter;
import ec.vector.DoubleVectorIndividual;

import java.io.File;
import java.io.IOException;

public class MyStatistics extends Statistics
{
    // The parameter string and log number of the file for our readable population
    public static final String P_POPFILE = "pop-file";
    public int popLog;

    // The parameter string and log number of the file for our best-genome-#3 individual
    public static final String P_INFOFILE = "info-file";
    public int infoLog;

    public void setup(final EvolutionState state, final Parameter base)
    {
        super.setup(state,base);

        // set up popFile
        File popFile = state.parameters.getFile(
                base.push(P_POPFILE),null);
        if (popFile != null) try
        {
            popLog = state.output.addLog(popFile,true);
        }
        catch (IOException i)
        {
            state.output.fatal("An IOException occurred while trying to create the log " +
                    popFile + ":\n" + i);
        }

        // set up infoFile
        File infoFile = state.parameters.getFile(
                base.push(P_INFOFILE),null);
        if (infoFile!=null) try
        {
            infoLog = state.output.addLog(infoFile,true);
        }
        catch (IOException i)
        {
            state.output.fatal("An IOException occurred while trying to create the log " +
                    infoFile + ":\n" + i);
        }

    }

    public void postEvaluationStatistics(final EvolutionState state)
    {
        super.postEvaluationStatistics(state);

        state.output.println("-----------------------\nGENERATION " +
                state.generation + "\n-----------------------", popLog);

        // print out the population
        state.population.printPopulation(state,popLog);

        // print out best genome #3 individual in subpop 0
        int best = 0;
        double best_val = ((DoubleVectorIndividual) state.population.subpops.get(0).individuals.get(0)).genome[3];
        for(int y = 1; y < state.population.subpops.get(0).individuals.size(); y++)
        {
            double val = ((DoubleVectorIndividual) state.population.subpops.get(0).individuals.get(y)).genome[3];
            if (val > best_val)
            {
                best = y;
                best_val = val;
            }
        }
        state.population.subpops.get(0).individuals.get(best).printIndividualForHumans(state,infoLog);
    }
}